Rigid Insulation at eaves?

[junglejim]

I’m insulating between rafters of our timber frame and trying to work out the best way of finishing at the eaves/wall plate. Currently extending over the wall plate to the eaves box allowing for 50mm ventilation gap but wondering if I need to close in or seal the ends of the rigid insulation in any way or whether it’s ok as it is.

 Thank you for any advice.

[nod]

Fine as it is I let tha cavity insulation rise above the wall plate an act as a stop end for the roof insulation Giving a continuous 50 void 

[junglejim]

9 minutes ago, nod said:

Fine as it is I let tha cavity insulation rise above the wall plate an act as a stop end for the roof insulation Giving a continuous 50 void 

Thanks that sounds good but in this case the walls are timber frame cassettes so no cavity and boxed in.

[junglejim]

23 minutes ago, nod said:

Fine as it is I let tha cavity insulation rise above the wall plate an act as a stop end for the roof insulation Giving a continuous 50 void 

Considering cutting notches out of the end of the insulation for air and then pushing right to the back of the sub fascia… what do you think ?

[nod]

Just now, junglejim said:

Considering cutting notches out of the end of the insulation for air and then pushing right to the back of the sub fascia… what do you think ?

As long as you leave a clear air passage 

It will be fine 

[Eric]

I used off cuts of tiling batten to create the air gap, 45 the bottom of the insulation so it sits on the wall head.

[junglejim]

3 minutes ago, Eric said:

I used off cuts of tiling batten to create the air gap, 45 the bottom of the insulation so it sits on the wall head.

Thanks @Ericyes doing similar but just not sure how to finish the eaves end… not sure what you mean sitting on the wall head? 

[junglejim]

I’m wondering if it’s worth putting a baffle in?

[Eric]

Cut the bottom of the sheet of insulation at 45 degrees so it sits on the wall plate, (eaves end) marked on your photo.

[junglejim]

13 hours ago, Eric said:

Cut the bottom of the sheet of insulation at 45 degrees so it sits on the wall plate, (eaves end) marked on your photo.

Thanks @Eric yes that’s what  I’m doing but wasn’t sure whether it also needed boxing in or something to prevent slippage downwards. They’re tight so can’t imagine them moving but overtime and with air movement … probably overthinking this and belt and braces so wondering everyone’s thoughts. Thank you for the help.

[Eric]

Overthinking it 😉

 

I used tiling battery to create the air gap but it also allows you to stick the insulation to the batten with silicone, make sure your insulation is good tight fit between the rafters, use airtight foam on the wall plate etc.